Improvement in sewing machines



DARLING L HUWE, ir.

Sewing Machine. y Y

No. 63,483. Patented April 2, 1867.

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GEORGE S. DARLIN G, OE BRIDGEPOBT, GONNEOTl'OUT, AND ELlAS HOWE, JR., OF FAlRFIELD, OONNECTGUT.

Letters Patent No. 63,483, dated April 2, 1867.

T0 ALL WHOM IT MAY OONCERN:

Be it known that we, G. S. DARLING, of Bridgeport, and ELIAS HOWE, Jr., of Fairfield, both in the'county of. Fairfield, and State of Connecticut, have invented a newand useful Improvement in Sewing Machines; and We do hereby declare that the following is a full, clear, andexact description thereof, which'will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in whichi Figure 1 represents a front elevation lof this invention partly in section.

Figure'2is a side `elevation of the same.

Figure 3 is a rear view of the same. I

Similar letters of reference indicate like parts.

This invention consists in connecting the presser-foot with the take-up or With the thread-controller.; or with both, in such a manner that the delivery of needle-thread is regulated according to the thickness of the material being scwed or the amount of thread let off from the spool is proportionately increased or diminished.

A represents the presser-foot' of a sewing machine, which is secured. to the bar B, that slides up and down in the head C, being subjected to the action of a spring, a, which has a tendency l`to depress the same in the ordinary manner. The head C also forms the bearing for the needle-bar D, which is made to move up and down` in the same by any suitable mechanism. E is the take-up, which is attached by a screw, b, to the front side of the head C, and the needle-thread, which passes from the eye c in the top of. the needle-bar down in front of the head C, is passed through the open staple d and through theloop e of. the take-up E, as indicated in red outlines in figs. 1 and 2 of the drawing. As the needle descends the slack istaken in by the take-np E so as to prevent the needle from passing throughor getting entangled in its own thread, and it is proper that the needle-thread shall be relieved of the tension produced by the take-up as soon as the point of the needle strikes the material to be sewed. This object is obtained by arranging the loop e so that its position is regulated automatically according to the thickness of the material to be sewed, a pin, f, being provided, which is connected to the rod B, carrying t the presser-foot A, and which bears on the take-up E, as shown in figs. 1 and 2 of the drawing. If thick material e is sewed the presser-foot is raised and the distance between the loop e and the open staple d is decreased, and eine versa, so that the talsehup will strike the pinfas soon as the point of the needle comes in contact with the l surface of the material to be sewed. l l

The varying amount of thread required for the stitches of the varying thicknesses of the material to be sewed is obtained by connecting the thread-controller F With the rod'B,Which carries the presser-foot. Usually said threadqcontroller is connected to the back of the head C by a set-screw, so that it can be adjusted up and down according to the thickness of the material to be sewed.

Instead of adjusting the thread-controller by hand, we have'rendered the'same self-adjusting by'making it in the form of anelboW-lever, which has itsfulcrum on the screw-'pivot g, and which connects by a wire, h, with the top end ofthe rod B that carriesthe presser-foot.. If thick material is sewed the presser-foot rises and the thread-controller is turned down, and its Vdistance from the eye c in the top of the needle-bar is increased and thereby the amount of thread required for the varying thicknesses of the material to be sewed is supplied.

We do not claim regulating the tension and the amount of thread delivered by the change oi' position of the presser-foot caused by the varying thickness of goods; but what we claim as new, and desire tosecure by Letters Patent, is

1. The pin f, or its equivalent, projecting from or connecting with the bar or any other part of the presserfoot to act in combination with the take-up E, substantially as and for the'purpose described.

2. The pivoted elbow-lever F, operating in combination with the presser-foot, substantially as described for the purpose specified.

, GEO. S. ADARLING,

ELIAS HOWE, Jr.. Witnesses: l I

FRANCIS Ivns, Fruto F. BARIUM. 

